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Updated: Jul 27, 2026

Analysis of Cerebral Vasospasm in a Murine Model of Subarachnoid Hemorrhage with High Frequency Transcranial Duplex Ultrasound
Published on: June 3, 2021
Assessment of CSF shunts by Doppler ultrasound
Abstract:
Doppler ultrasound was used to detect flow through 160 C.S.F. shunt systems, 94 without suspected blockage, 62 with suspected blockage. An accuracy of 87% was achieved and we found this test helpful in clinical management in a significant number of cases. The test can distinguish between blockage of proximal and distal catheters and in certain situations can indicate infection of the distal catheter. Follow-up is continuing to determine the reliability of this technique in deciding whether asymptomatic patients are valve-dependent or not. The test is simple to learn and noninvasive.
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